MCP server for n8n workflow automation - manage workflows, executions, tags, variables, credentials and users via the Model Context Protocol
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ntatschner
Source: github_code
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Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
When Vitest UI server is listening, arbitrary file can be read and executed
N8N_API_KEYYes — Your n8n API key (or password for basic auth)N8N_API_URLNo http://localhost:5678 Base URL of your n8n instanceN8N_API_USEROnly for basic — Username for basic authenticationN8N_AUTH_TYPENo apikey Authentication method: apikey, bearer, or basicN8N_TIMEOUT_MSNo 30000 Request timeout in millisecondsTool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
22/22 tools missing one or more hints — list_credentials (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); list_executions (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_execution (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +19 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Tool inputs are validated
12/22 tool handlers declare input schemas (55%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tool test coverage
Only 1/22 tools referenced in tests (5%)
Write tests that reference each tool by name so every tool has at least one test.
Shell command execution
2 child_process/subprocess calls in production code — runs shell commands (src/setup.ts:111, src/setup.ts:195)
Prefer library functions over shell-outs. If you must shell out, ensure all inputs are properly escaped.
Secrets stay with their owner
1 secret/sensitive value flow into network calls (N8N_API_KEY → dynamic)
Audit where credentials are sent. A NOTION_TOKEN should only reach api.notion.com — never a third-party host.
Secrets not logged
1 secret value sent to console.log
Redact or omit secret values from log output.
Dev dependencies
1 critical/high in dev-only deps (does not ship to users)
Upgrade dev dependencies when convenient.
Domain consistency
npm scope @thecodesaiyan doesn't match GitHub owner ntatschner
Use the same org name across GitHub, npm, and your homepage so users can verify the publisher.
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